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Arul Muthiah, M.
- Signatures of very Severe Cyclonic Storm Phailin in Met-Ocean Parameters Observed by Moored Buoy Network in the Bay of Bengal
Abstract Views :269 |
PDF Views:121
Authors
R. Venkatesan
1,
Simi Mathew
1,
J. Vimala
1,
G. Latha
1,
M. Arul Muthiah
1,
S. Ramasundaram
1,
R. Sundar
1,
R. Lavanya
1,
M. A. Atmanand
1
Affiliations
1 National Institute of Ocean Technology, Velachery–Tambaram Main Road, Pallikaranai P.O., Chennai 600 100, IN
1 National Institute of Ocean Technology, Velachery–Tambaram Main Road, Pallikaranai P.O., Chennai 600 100, IN
Source
Current Science, Vol 107, No 4 (2014), Pagination: 589-595Abstract
The moored buoy network deployed in the Bay of Bengal played a critical role in the collection and transmission of surface meteorological and oceanographic conditions in real time through satellite telemetry, enabling constant monitoring of the cyclone Phailin. It is the first report of in situ timeseries measurement of a very low pressure taken during cyclones in the northern Indian Ocean. The BD10 buoy recorded a minimum atmospheric pressure of 920 hPa, which happened to be within the eye of the cyclone. This article presents an account of important changes that were observed in the surface meteorological and oceanographic parameters under the influence of the very severe cyclonic storm Phailin. An attempt has been made to understand the role of stratification in intensifying the cyclone Phailin in comparison with the cyclone Lehar which weakened in the ocean itself, based on subsurface data from the moored buoys which were on the track of the respective cyclones. Both the cyclones traversed across the Bay of Bengal in a similar way and the buoys were very close to the cyclone track withstood the rough sea conditions during the storms with their specially designed body. The BD09 buoy which happened to be on the right side of the track of cyclone Phailin moved in a circular path as a result of the inertial oscillation forced by the strong cyclonic winds.Keywords
Cyclonic Storm, Met-Ocean Parameters, Moored Buoy, Real-Time Observations.Full Text
- Differential Upper Ocean Response Depicted in Moored Buoy Observations during the Pre-Monsoon Cyclone Viyaru
Abstract Views :224 |
PDF Views:74
Authors
R. Venkatesan
1,
K. Jossia Joseph
1,
C. Anoopa Prasad
1,
M. Arul Muthiah
1,
S. Ramasundaram
1,
P. Murugesh
1
Affiliations
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
1 National Institute of Ocean Technology, Ministry of Earth Sciences, Chennai 600 100, IN
Source
Current Science, Vol 118, No 11 (2020), Pagination: 1760-1767Abstract
The pre-monsoon cyclone Viyaru in the Bay of Bengal during May 2013 traversed a long track from 5°N to 22°N over 7 days with basin-wide response, which was well captured by the time series observations of OMNI buoy network along with satellite data. The differential upper ocean characteristics and its variable response reveal that vertical mixing override horizontal advection during cyclone passage. This study provides insight into the variability in wave spectra, differential response on either side of the track and presence of cold core eddy combined with a thick barrier layer in modulating the upper ocean response.Keywords
Bay Of Bengal, Barrier Layer, Cyclone Viyaru, Eddies, OMNI Buoys, Wave Spectra.Full Text
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